Table 1 Classification of malignant skin tumors
From: Imaging findings of malignant skin tumors: radiological–pathological correlation
Layer | Origin | Malignant tumor |
|---|---|---|
Epidermis | Keratinocytic/epidermal tumors | Actinic keratosis, Bowen’s disease |
Basal cell carcinoma | ||
Squamous cell carcinoma | ||
Merkel cell carcinoma | ||
Dermis | Appendageal tumors | Proliferating trichilemmal tumor |
Follicular differentiation | Trichilemmal carcinoma | |
Pilomatrical carcinoma | ||
Sebaceous differentiation | Sebaceous carcinoma | |
Porocarcinoma | ||
Apocrine and eccrine differentiation | Hidradenocarcinoma | |
Microcystic adnexal adenocarcinoma | ||
Apocrine carcinoma | ||
Site-specific tumors | Extramammaly Paget disease | |
Melanocytic tumors | Melanocytic tumors in intermittently sun-exposed skin | |
Melanocytic tumors in chronically sun-exposed skin | ||
Acral melanoma | ||
Fibroblastic tumors | Dermatofibrosarcoma protuberans | |
Dermis/subcutaneous tissue | Tumors of hematopoietic and lymphoid origin | Mycosis fungoides |
Sézary syndrome | ||
Soft tissue tumors | Atypical lipomatous tumor | |
Adipocytic tumors | Pleomorphic liposarcoma | |
Vascular tumors | Cutaneous angiosarcoma |